<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>||</title>
    <script type="text/javascript">
        console.log(!!0,!!'',!!undefined,!!'asd');
        var result=0||''||undefined||null||'qwe'||true;
        console.log(result);
        var result01=0||''||undefined||null;
        console.log(result01);
    </script>
</head>
<body>

</body>
</html>